Ed, EG> Email privacy and spam are such general problems today that I'd EG> like to ask the ietf-org list for feedback (private if you wish) EG> on this suggestion. There are more specific forums where this EG> can (and shall) be discussed. Indeed there are. That's why this thread should be moved to the IRTF's ASRG venue <http://asrg.sp.am/>. Your proposal is in line with some existing ones, at least one of which response to the seriously problematic key management issue. d/ -- Dave Crocker <dcrocker-at-brandenburg-dot-com> Brandenburg InternetWorking <www.brandenburg.com> Sunnyvale, CA USA <tel:+1.408.246.8253>